KB Hypereutectic Piston 3.940" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.0 cc Drag Parachute Pack Are your standard cheek pads

Are your standard cheek pads a little too tight or a little too loose

For Small Block Chevy with enlarged lifter bores

these XD-A pushrods can be adjusted from 8

4 AN Male to 4 AN Male Bulkhead

They also fit a factory-equipped 351W 1969-73 Mustang (must be factory-equipped

KB Hypereutectic Piston 3.940" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.0 cc Drag Parachute Pack Are your standard cheek padsProduct Description: Piston KB Series Hypereutectic 3. 940 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Minus 5. 00 cc Small Block Mopar Set of 8 Created from a high silicon aluminum alloy, KB Performance pistons are lightweight to improve throttle response and RPM changes while still being strong enough to withstand high compression and high temperatures. Each piston is engineered with race ready features like high upper compression ring locations, gas